Improvement in adjustable bolsters for beds



J. HOFMANN. ADJUSTABLE BOLSTERSFOR BEDS. N'o. 177,511.- Patented May16,1876.

Altai. Y J Wm, 226%? N-PEI'ERS. FNOTO-LITHOGRAPMER, WASHINGTUIQ. D. C

UnIrEnSTATEs PATENT QFFI E T J AOOB HOFMANN, OF P ORTLAND, OREGON.

IMPROVEMENT IN ADJUSTABLE BOLST'ERS FOR BEDS.

Specification forming partof Letters Patent No. 177,511, dated May 16, 1876 application filed v February 7, 1876. r

, To all whom it may concern: 1 I

Be it known that L'JAGOB HOFM ANN, of Portland, in the county of Multnomah and State of Oregon, have invented an Improved Adjustable Bed-Bolster, of which the .following is a-specification:

The nature of my invention relates to an improvement in adjustable bolster for bedsteads, and more particularly upon that for which Letters Patent No.114t,819 were issued to me May 16,1871; and the invention consists in the peculiar devices employed for adjusting the elevation and inclination of the bolster-frame, as more fully hereinafter set forth.

Figure 1 is a rear perspective view. Fig. 2 is apartial plan of the rotary rack-bar for locking the head-braces. tion of the double bolt which locks the segments.

1n the drawing, A represents, a frame, extending across the head of the bedstead, and in whose head irt two slots, a a, are cut, in each of which slides a flanged plate, 1), provided with teeth 0 upon the inner edge of the top part.

Between the twohead-girts a serrated bar, B, is eccentrically journaled to the sides of the frame A, by means of a trunnion at each end engaging its serrations with the teeth 0 of the platesb wheneverit is turned up to a horizontal position, thus locking them, and it isso held by a pin, d, inserted through the side of the frame, passing under its heavy side.

(J is an upholstered bolster-frame, whose upper end is supported by crossed braces b gether. is provided with a sleeve, 6, to slide upon the Fig. 3 is a sectional eleva- 1), whose lower ends are hooked into eyes in the plates 1) I).

main frame.

- A locking-bolt, 6, made in two parts, slides in standards f, erected on the inner girt of the frame A, passing through one of a series of holes in each segment, and through one in the end of each are, thus locking them to- The inner end of one part of the bolt other, and a spring, g, spirally coiled upon it, acting between a collar, h, upon each half of the bolt, pushes the ends apart, and thereby causes them to lock the segments to the arcs.

The elevation of the inner end of the bolster-frame is governed by the adjustment of the segments in their respective arcs, and the inclination is adjusted by shifting the positions of the crossed braces under the head end of the bolster-frame. I

What I claim as my invention is- 1. The rotary serrated bar B, plates 1; b, and

braces I) b, in combination with the frames A and O, for adjusting the inclination of the latter, substantially as described.

2. The segments D D, flanged arcs E E, and the springbolts e e, for adjusting the elevation of the frame 0 with relation to the frame A, substantially as described.

JACOB HOFMANN. .Witnesses: WM. H. Lorrz,

WM. HOFFMANN. 

